Genius Netmouse Pro and Keymap for Argentina

Does anyone know what KEYMAP to use for Argentina?
Also, I can't get the "weel" on my Genius Netmouse Pro PS/2 to work.
I have tried in xorg.conf with option "protocol" "netmouseps/2" and "intellimouse"
and also adding zxaxisblahblah "4 5" without luck.
Any ideas?
TIA